Health Calculators
Kids bedtime.
Pick your child's age group and the time they wake up. You get the window of bedtimes that still reaches the recommended sleep hours. Runs in your browser; nothing is sent or stored.
Your numbers
Result
Fill the form and press Calculate.
The Canadian 24-Hour Movement Guidelines recommend 11 to 14 hours of sleep for ages 1 to 2 (naps included), 10 to 13 hours for ages 3 to 4, 9 to 11 hours for ages 5 to 13 and 8 to 10 hours for ages 14 to 17. Count back from the wake-up time to find the bedtime window.
Not medical advice. This is arithmetic on published ranges, not a sleep plan. Children vary; if your child is unusually sleepy, struggles to sleep or snores heavily, ask your doctor or public health nurse.
Worked example
Child aged 5 to 13 who wakes at 7:00 AM and takes about 15 minutes to fall asleep. Recommended sleep is 9 to 11 hours, so they should be asleep between 8:00 PM and 10:00 PM. Allowing 15 minutes to fall asleep, that means being in bed between 7:45 PM and 9:45 PM. A 3 to 4 year old who wakes at 6:30 AM and naps 1.5 hours needs 8.5 to 11.5 hours at night, so should be asleep between 7:00 PM and 10:00 PM.
How it works
Total recommended sleep for the age group is minimum and maximum hours. Any nap you enter is subtracted to give the night-time range. Falling-asleep time is counted back from the earliest and latest asleep times to give the in-bed times. Times past midnight roll over correctly. Babies under 1 year have separate, longer ranges and are not covered here.
Sources
Canadian 24-Hour Movement Guidelines for the Early Years (0-4 years): An Integration of Physical Activity, Sedentary Behaviour, and Sleep, CSEP, for 1 to 2 years (11 to 14 hours including naps) and 3 to 4 years (10 to 13 hours, which may include a nap). Canadian 24-Hour Movement Guidelines for Children and Youth (5-17 years): An Integration of Physical Activity, Sedentary Behaviour, and Sleep, CSEP, for 5 to 13 years (9 to 11 hours) and 14 to 17 years (8 to 10 hours). Both guidelines recommend consistent bedtimes and wake-up times. Both pages opened 2026-10-08. The nap input and the minutes-to-fall-asleep input are your own numbers, not published figures.
FAQ
How much sleep does a child need?
The Canadian 24-Hour Movement Guidelines say 11 to 14 hours for ages 1 to 2 including naps, 10 to 13 hours for ages 3 to 4, 9 to 11 hours for ages 5 to 13 and 8 to 10 hours for ages 14 to 17.
What time should a 7-year-old go to bed if they wake at 6:30 AM?
With 9 to 11 hours recommended for ages 5 to 13, they should be asleep between 7:30 PM and 9:30 PM. With 15 minutes to fall asleep, in bed between 7:15 PM and 9:15 PM.
Do naps count toward the total?
For ages 1 to 2 the guideline range includes naps, and for ages 3 to 4 it may include a nap. Enter the nap hours and this calculator takes them off the night total.
What about babies under 1 year?
The guidelines give 14 to 17 hours for 0 to 3 months and 12 to 16 hours for 4 to 11 months, including naps. Bedtime is less fixed at that age, so this calculator starts at age 1.
Why does the guideline mention consistent times?
Both the early-years and the children-and-youth guidelines recommend consistent bedtimes and wake-up times, so the window is more useful if you keep it the same most days.
Is this medical advice?
No. It applies published recommended ranges to your wake-up time. Talk to your doctor about any sleep problem.